Question

Which expression is equivalent to this one?

–7(5 + 10)



A.


(–7) · 5 + (–7) · 10


B.


(–7) · 5 + 10


C.
(–7) + 5 + 10


D.


(–7) · 5 · 10

Answer 1

distributive property: (a) (b + c) = (a)·b + (a)·c
so (-7) (5 + 10) =

Answer 2

Which expression is equivalent to this one?

6(x – 17)



A.


6x – 17


B.


6x · (–17)


C.


6x – 6 · 17


D.


6 + x – 17

Answer 3

same idea as before :)
distributive property: a(b - c) = ab - a·c
so 6(x–17) =

Answer 4

6x17?

Answer 5

or no

Answer 6

subtracting x -17 right

Answer 7

yes there is a subtraction :)
so the end result would be something like 6x - 6 times 17

Answer 8

Rewrite the expression by using grouping symbols.



y • 4 + y • z



A.


y (4 + z)


B.


z(y • 4)


C.


y • (4 + y) • z


D.


4(y + z)

Answer 9

same idea and now just reversed :)
so distributive property: a·b + a·c = a(b + c)
like take the thing that they have in common and put it out front :)

Answer 10

so its c

Answer 11

not quite :)

for example if it was y·7 + y·x
then it would become y (7 + x)

Answer 12

i see

Answer 13

i think i got answer

Answer 14

lol never mind

Answer 15

lol well you can take a guess ;)

Answer 16

a :o

Answer 17

Correct! :D :D :D

Answer 18

:D

Answer 19

Evaluate the expression without using a calculator.

63 · 8



A.
484


B.
494


C.
504


D.
638

Answer 20

what is 3 times 8 = ?

Answer 21

21

Answer 22

try again? :)

Answer 23

hold up

Answer 24

keep bored messing up i got it

Answer 25

i know the answer just keybored messingup

Answer 26

24

Answer 27

ok :)
then 6 times 8 = ?

Answer 28

48

Answer 29

then 48 + 2 = ?
(the "2" is from the "24")

Answer 30

50

Answer 31

so you get 504

the drawing tool isn't working for me right now... but this would be the basic concept http://www.wikihow.com/Do-Long-Multiplication

Answer 32

oh cool

Answer 33

last question

Answer 34

What is the solution to the equation?



5(8 + 7) = 5 • x + 5 • 7



A.


x = 1


B.


x = 5


C.


x = 7


D.


x = 8

Answer 35

remember a few problems before when I showed you
for example if it was y·7 + y·x
then it would become y (7 + x)

then what would 5•x + 5•7 become? :)

Answer 36

mhmm

Answer 37

Your answer's C.

Answer 38

to What is the solution to the equation?



5(8 + 7) = 5 • x + 5 • 7



A.


x = 1


B.


x = 5


C.


x = 7


D.


x = 8
?

Answer 39

Distributive Property...

Answer 40

5(8 + 7) = 5 • x + 5 • 7 distribute
40 + 35 = 5x + 35 subtract 35 from both sides
-35 -35
40 = 5x divide both sides by 5
so x = 40 divided by 5 = (simplify)

Answer 41

um guys

Answer 42

i got a 100%

Answer 43

you're welcome :P

Answer 44

thanks Jigglypuff314

Answer 45

ok guys

Answer 46

i have one more test will you guys help me

Answer 47

Good JOb @jigglypuff314 !!